Pay Per View watch later?

Hi,

I ordered an HD pay-per-view event last night, but was unable to finish watching. I thought there was a method to view the event for a certain period of time (24hrs?) after the original airing, without having to purchse the event again. I have definitely done this before when purchasing these events by outlets other than Comcast PPV.

Calling technical support just now didn't provide any ability to view the remainder of the HD event... but only an upcoming scheduled SD version.